<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
   <title>Document</title>
<style>
    body{
        width: 1000px;
        margin: 0px auto;
    }
    header{
        height: 100px;
        background-color: silver;
       
    }
    main{
        height:400px;
        background-color: #bfa;
        margin: 10px auto;
       
     
    }
    .left,.middle,.right{
        height: 100%;
        float: left;
    }
    .left{
        width: 150px;
        background-color: aqua;
    }
    .middle{
        width: 680px;
        background-color:bisque;
        margin: 0 10px;
    }
    .t1{
        height: 180px;
        width: 100%;
        background-color:cornflowerblue;
        margin-top: 10px;
    }
    .t2{
        height: 190px;
        width: 100%;
        background-color:violet;
        margin-top: 10px;
    }
    .right{
        width: 150px;
        background-color: cadetblue;
    }
    footer{
        height: 100px;
        background-color: tomato;
        }
 
</style>
</head>
<body>
  <header></header>
  <main>
      <div class="left"></div>
      <div class="middle">
          <div class="t1"></div>
          <div class="t2"></div>
      </div>
      <div class="right"></div>
  </main>
  <footer></footer>  
</body>
</html>